Q: When the force acts in the direction of motion, then the speed will increase or decrease?
A: When the force acts in the direction of motion, then the speed will increases. It can be understood…
Q: What would happen to the speed of the stopper if you add more washers?
A:
Q: A pair of knife has its blades 15cm long, while its handles are 7.5 cm long. Calculate its…
A: Given: Load arm = 7.5 cm Effort arm = 15 cm. Solution: Mechanical advantage of a lever is the ratio…
Q: if the book fals of the shelf, what will be its speed when it hits the ground.
A: Every object has two types of energies. They are Potential energy and Kinetic energy. Potential…
Q: Name the pulley which has no gain in mechanical advantage. Explain, why is such a pulley then used?
A:
Q: A force of 50 N is applied to the end of a lever, which is moved a certain distance. If the other…
A:
Q: In a single fixed pulley, if the effort moves by distance x downwards, by what height is the laod…
A:
Q: A bus uses the kinetic energy of the flywheel, which is supplied by the electricity at stations. How…
A: Given data:
Q: An Atwood machine has M1 = 2Kg and M2= 10Kg, the pulley has no mass. Calculate the acceleration of…
A:
Q: What is the power done by gravity to make a ball of mass 0.6 kg roll from 8.9 m above the ground to…
A:
Q: Conservative forces lose no mechanical energy to
A: Any energy of the system is lost into the heat energy. In the case of the conservative force, there…
Q: If an input of 100 J in a pulley system increases the potential energy of a load by 60 J, what is…
A: Given that Input energy = 100 J Output energy = 60 J
Q: Assume that you are riding a bicycle. An applied force of 701 N downward is applied as you push on…
A: MA = Fo/Fi
Q: the hammer of a pile driver weighing 72N falls through a height of 5m. if it drives a nail 18cm into…
A: The third equation of motion is v2 = u2 + 2 a s where, v is the final velocity, u is the initial…
Q: If an input force of 202 N is applied to the handles of the wheelbarrow with a mechanical advantage…
A: The input force applied to the handles is, The mechanical advantage of the wheelbarrow is,
Q: Both a pair of scissors and a pair of pliers belong to the same class of levers, Name the class of…
A: A pair of scissors and a pair of pliers both belongs to class 1 lever.A pair of scissors has…
Q: Energy associated with the position of object is called ___ energy and is determined by its ___ and…
A: Answer potential mass height
Q: A force of 50N is applied to the end of a lever, which is moved a certain distance. If the other end…
A: Step 1Force that is applied to the end of a lever isTo find the force exerted when the other end of…
Q: Can a machine act as a force multiplier and speed multiplier simultaneously ? If yes , how?
A: No, a machine cannot act as a force multiplier and speed multiplier simultaneously.
Q: During a bench press, does the amount of work, or power, required depend on the rate at which the…
A: The amount of work done is the product of the force applied and the distance through which the…
Q: For the pulley system shown, what is the upper limit of weight the strong man can lift?
A: Given: A man lifts a weight by a pulley
Q: Do you think there are any other types of simple machines, other than pulley, lever, wedge, wheel…
A: Here there are only given six types of simple mechines,pully, lever,wedge wheel and axle,inclined…
Q: A steel ball of mass 5 kg is rolling over a frictionless surface, as show the ball reaches point A…
A: Given:- A steel ball is m = 5 kg When the ball reaches point A it has mechanical energy E= 250 J…
Q: Name the machine which is used to multiply speed?
A: There are three kinds of lever, first class lever, second class lever and third class lever.For the…
Q: What is the efficiency of the machine that miraculously converts all the input energy to useful…
A: GivenInput energy = Output useful energy
Q: How far will the 100-kg block move 2 seconds after it is released from the position shown. The…
A:
Q: Why is it important to reduce friction on compound machines?
A: The friction force is the force which opposes the relative motion between the two bodies.
Q: A bicycle is a compound machine using levers and gears. (a) True (b) False
A: Levers and Gears are simple machines on their own. However, bicycle is a compound machine that is…
Q: Which is not a simple machine? O pulley ramp O bicycle wood screW
A: Pulley, Ramp and Wood Screw are all simple machines. Often, they are single piece components.…
Q: Abox is moved using 200 N of force over a distance of 15 m. If the box is moved in 1.4 seconds, how…
A: Power is equal to the rate of work done with respect to time.So if W amount of work is done within…
Q: A uniform cable hanging over the edge of a tall building is 80 ft long and weighs 45 lb. How much…
A: Workdone = 787.5 lb ft
Q: Mechanical energy is the sum of
A: Required : Mechanical energy is the sum of..
Q: 25. If a complex machine is made up of a lever with a mechanical advantage of 3 and a wheel and axle…
A: Mechanical advantage is resistance force, Fr divided by effort force , Fe. And MAtotal = MA1 ×MA2
Q: In a single movable pulley, if the effort moves by distance x upwards , by what height is the laod…
A: The expression for the velocity ratio,
Q: Match each type of simple machine with its example. 1. wedge a. doorknob b. chisel 2. wheel and axle…
A: 1. Wedge - chisel (both have one thick end and one pointed end) 2. Wheel and axle - Doorknob (same…
Q: Where does the force need to be produced on a lever if it has a resistance arm of .90m and 35kg of…
A: In order to balance the two weights, the torque must be equal to zero.Solve the force applied to the…
Q: If the larger gear has 30 teeth and the smaller gear has 18, then the gear ratio (larger to smaller)…
A: Given data: The larger gear has 30 teeth. The smaller gear has 18 teeth. The gear ratio is 5:3. The…
Q: What type of simple machine is a flight of stairs? O pulley wedge inclined plane lever
A: A Simple Machine is a machine which helps in changing the direction of application of Force or in…
Q: Nobody at the playground wants to play with the obnoxious boy, so he fashions a seesaw as shown so…
A: The picture shows the boy sitting on the board with the fulcrum being extremely close to him and…
Q: When a rope is wrapped around a wheel (or pulley) and pulled, the lever arm is the ________ of the…
A: The liver arm is the perpendicular distance from the axis of rotation to the line of action of the…
Q: What is the velocity ratio of a single movable pulley?
A: The expression for the velocity ratio,
Q: What is the power done by gravity to make a ball of mass 0.68 kg roll from 1.3 m above the ground to…
A: Power = Energy/time P=E/t E=mgh m=0.68 kg h=1.3 m g=9.8 m/s^2 E=0.68*1.3*9.8 = 8.6632 J t=2.68 s
Q: If a machine multiplies force by a factor of 4, what other quantity is diminished, and by how much?
A:
Q: Name the machine which is used to multiply force?
A: Simple force multiplying devices are used in various forms in many machines. Many machines are the…
Give reason why in a single fixed pulley, the velocity is always more than the mechanical advantage.
The expression for the velocity ratio,
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- For the pulley system shown, what is the upper limit of weight the strong man can lift?How can a mass, m, lift twice its mass or 2m? What other examples of Mechanical Advantage are an average thing to find around the house?If an input force of 202 N is applied to the handles of the wheelbarrow with a mechanical advantage of 2.2. How large is the output force that just lifts the load?
- Where does the force need to be produced on a lever if it has a resistance arm of .90m and 35kg of resistance and the force produced is 50kg to keep this in balance?What is the power done by gravity to make a ball of mass 0.68 kg roll from 1.3 m above the ground to the bottom along a curved path if it takes 2.68s to do so?When a rope is wrapped around a wheel (or pulley) and pulled, the lever arm is the ________ of the wheel and the angle between this and the force is ALWAYS ________ degrees.
- Name the machine which is used to multiply speed?an automobile with a mass of 76.0 kg is 1.00 m from the end of a 2.22 m workbench. what mass, in kg, must each end of the workbench supportDuring a bench press, does the amount of work, or power, required depend on the rate at which the weight is lifted?